2013-06-27 07:20:09 +02:00
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/*
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* This file is part of the coreboot project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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2014-01-04 08:42:02 +01:00
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#include <stdlib.h>
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2013-06-27 07:20:09 +02:00
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#include <console/console.h>
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#include <cbmem.h>
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2014-01-03 14:15:22 +01:00
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#include <arch/acpi.h>
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2013-06-27 07:20:09 +02:00
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2014-12-19 07:20:45 +01:00
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#if IS_ENABLED(CONFIG_LATE_CBMEM_INIT)
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2013-09-04 12:31:39 +02:00
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2013-09-04 12:26:11 +02:00
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void __attribute__((weak)) backup_top_of_ram(uint64_t ramtop)
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{
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2017-03-16 23:18:22 +01:00
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/* Do nothing. Chipset may have implementation to save ramtop in NVRAM.
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*/
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2013-09-04 12:26:11 +02:00
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}
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2017-04-19 06:37:38 +02:00
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unsigned long __attribute__((weak)) get_top_of_ram(void)
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2013-06-27 07:20:09 +02:00
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{
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2017-04-19 06:37:38 +02:00
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return 0;
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2015-05-26 18:15:45 +02:00
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}
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2017-04-19 06:37:38 +02:00
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#endif /* LATE_CBMEM_INIT */
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2013-10-11 23:22:57 +02:00
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2017-04-19 06:37:38 +02:00
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#if IS_ENABLED(CONFIG_CBMEM_TOP_BACKUP)
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static void *ramtop_pointer;
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void set_top_of_ram(uint64_t ramtop)
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2013-10-11 23:22:57 +02:00
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{
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2017-04-19 06:37:38 +02:00
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backup_top_of_ram(ramtop);
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if (ENV_RAMSTAGE)
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ramtop_pointer = (void *)(uintptr_t)ramtop;
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2013-10-11 23:22:57 +02:00
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}
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2013-10-13 03:15:40 +02:00
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void *cbmem_top(void)
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{
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/* Top of cbmem is at lowest usable DRAM address below 4GiB. */
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2017-04-19 06:37:38 +02:00
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uintptr_t ramtop;
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if (ENV_RAMSTAGE && ramtop_pointer != NULL)
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return ramtop_pointer;
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2015-05-26 18:15:45 +02:00
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2017-04-19 06:37:38 +02:00
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ramtop = get_top_of_ram();
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2015-05-26 18:15:45 +02:00
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2017-04-19 06:37:38 +02:00
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if (ENV_RAMSTAGE)
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ramtop_pointer = (void *)ramtop;
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return (void *)ramtop;
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2013-10-13 03:15:40 +02:00
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}
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2014-12-19 07:20:45 +01:00
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2017-04-19 06:37:38 +02:00
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#endif /* CBMEM_TOP_BACKUP */
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2014-01-03 14:15:22 +01:00
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2014-12-18 17:30:29 +01:00
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/* Something went wrong, our high memory area got wiped */
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2014-01-03 14:15:22 +01:00
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void cbmem_fail_resume(void)
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{
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2014-12-18 17:30:29 +01:00
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#if !defined(__PRE_RAM__) && IS_ENABLED(CONFIG_HAVE_ACPI_RESUME)
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/* ACPI resume needs to be cleared in the fail-to-recover case, but that
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* condition is only handled during ramstage. */
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2014-01-03 14:15:22 +01:00
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acpi_fail_wakeup();
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#endif
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}
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